GE JKP20, JKP25, JKP28, JKP48, JKP50,JTP20, JTP25, JTP28, JTP48, JTP50 Owner's Manual page 10

Using the Sabbath feature.
10
How to Exit the Sabbath Feature
Press the CLEAR/OFF pad.
If the oven is cooking, wait
for a random delay period of
approximately 30 seconds to 1
minute, until only ⊃ is in the display.
Press and hold both the BAKE and
BROIL HI/LO pads, at the same time,
until the display shows SF.
Tap the DELAY START pad until
12 shdn or no shdn appears in the
display. 12 shdn indicates that the
oven will automatically turn off after
12 hours. no shdn indicates that the
oven will not automatically turn off.
Press the START pad.
NOTE: If a power outage occurred while
the oven was in Sabbath mode, the oven
will automatically turn off and the oven
control must be reset.